Arc groove rolling shaft friction support for underground subway station supporting column

Abstract

The invention discloses an arc groove rolling shaft friction support for an underground subway station supporting column. The arc groove rolling shaft friction support is mainly composed of an upper base plate, a lower base plate, a polytetrafluoroethylene arc plate and a steel rolling shaft; a long-strip-shaped arc groove is formed in the upper surface of the lower base plate, the polytetrafluoroethylene arc plate is fixedly installed in the long-strip-shaped arc groove, the steel rolling shaft is placed on the polytetrafluoroethylene arc plate, is in sliding contact with the polytetrafluoroethylene arc plate and is in rolling contact with the upper base plate, and the upper base plate and a structural top beam are poured together through welding anchor bars to form an embedded steel plate to be fixed to the bottom face of the top beam; and horizontal relative movement between the supporting column and the top beam of the underground subway station is achieved through the arc groove rolling shaft friction support, and relative horizontal deformation of the supporting column under the earthquake action can be greatly reduced by releasing joint horizontal constraint. The vertical bearing capacity is high, the steel rolling shaft is not prone to damage, production is easy, installation and maintenance are convenient, and the service life is long.

Description

technical field [0001] The invention relates to the construction field of underground structure engineering, in particular to a circular arc groove roller friction bearing for supporting columns of underground subway stations. Background technique [0002] With the continuous development of urban construction, the scale of the city continues to expand, and the population is also increasing. The urban traffic problem has become a "bottleneck" that restricts the all-round development of the city. The development and utilization of underground space is an important way to relieve the pressure of the urban ecological environment and challenge the living space, which has become a hot spot of public concern. The development of a large-capacity rapid public transportation system with subway engineering as the backbone plays an indispensable role in solving urban transportation problems. The development and utilization of underground space in my country has broad prospects, and the...

AI Technical Summary

Problems solved by technology

Relevant studies have shown that the joint action of horizontal and vertical ground motions led to the serious collapse of Dakai Station, and vertical ground motions are the key factors causing damage to underground structures, especially for shallow buried underground structures, vertical ground motions It may cause the shear failure of the overlying soil to become sluggish and all act on the roof of the structure. The central column bears too high a vertical load, resulting in a significant increase in the axial compression ratio of the central column, and its ability to resist shear deformation is significantly weakened. At the same time, The changes in the axial compression ratio of the supporting members in the structure are not consistent. For box-shaped subway stations, the change in the axial compression ratio of the central column is much higher than that of the side walls, which reduces the lateral deformation capacity of the central column. At the same time, it bears more horizontal shear force, and the deformation of the central column and the side wall is not coordinated, so that the central column is damaged before the side wall, which leads to the overall collapse of the roof and the underground structural system

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